/*
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 * and open the template in the editor.
 */

package session3;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author thanh
 */
@WebServlet(name = "ControllerServlet", urlPatterns = {"/ControllerServlet"})
public class ControllerServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here. You may use following sample code. */
            String action = request.getParameter("action");
            RegistrationDAO dao = new RegistrationDAO();
            String url = "error.jsp";
            HttpSession session = request.getSession();
            if(action.equals("Login")){
                String username = request.getParameter("txtUsername");
                String password = request.getParameter("txtPassword");
                if(dao.checkLogin(username, password)){
                    session.setAttribute(username, password);
                    url = "ControllerServlet?action=Search&txtSearch=";//truyền tham số vào thanh địa chỉ
                }else{
                    request.setAttribute("Error","Invalid username or password");
                }
            }
            else if(action.equals("Insert")){}
            else if(action.equals("Delete")){}
            else if(action.equals("Update")){}
            else if(action.equals("Search")){
                String search = request.getParameter("txtSearch");
                ArrayList list = dao.searchLikeName(search);
                request.setAttribute("Info",list);
                url = "serach.jsp";
                        
            }
            else{
                request.setAttribute("Error","Action does not support");
            }
            request.getRequestDispatcher(url).forward(request,response);//K in trên address bar
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
